Kōyasan
May
Weather in Kōyasan for May 2026
Your guide to Kōyasan weather in May - trends and predictions
In general, the average temperature in Kōyasan at the beginning of May is 19 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 17.9 °C by the end of May.
Kōyasan in May brings notable rainfall, with an average of 20 rainy days and a total precipitation of 291.9 mm.
Is May a good time to visit Kōyasan? check out the best time to travel to Kōyasan page.
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Temperatures
Rain 🌧️
More
11
Dry days
20
Rainy days
0
Snow days
21°/11°
Temperatures
12 km/h
Avg max wind
78 %
Avg humidity
Kōyasan Weather May
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Temperatures trend during May in Kōyasan
See the weather trend as well as the moving average line
May weather in Kōyasan day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Cloudy | 23° /8° | 0 mm | 5 | |
| 2 May |  Moderate or heavy rain shower | 17° /10° | 33.9 mm | 4 | |
| 3 May |  Partly cloudy | 21° /7° | 0 mm | 6 | |
| 4 May |  Patchy rain possible | 18° /10° | 0.3 mm | 4 | |
| 5 May |  Overcast | 20° /7° | 0 mm | 5 | |
| 6 May | Moderate or heavy rain shower | 16° /12° | 35.4 mm | 4 | |
| 7 May | Overcast | 18° /9° | 3.8 mm | 4 | |
| 8 May | Overcast | 21° /5° | 0 mm | 5 | |
| 9 May | Moderate or heavy rain shower | 18° /10° | 21.2 mm | 4 | |
| 10 May |  Heavy rain at times | 23° /14° | 11.5 mm | 5 | |
| 11 May | Patchy rain possible | 18° /10° | 6.8 mm | 4 | |
| 12 May | Patchy rain possible | 19° /11° | 3.9 mm | 4 | |
| 13 May |  Sunny | 22° /10° | 0 mm | 6 | |
| 14 May | Overcast | 24° /10° | 0 mm | 5 | |
| 15 May | Cloudy | 24° /10° | 0 mm | 5 | |
| 16 May | Moderate rain at times | 25° /12° | 1.1 mm | 6 | |
| 17 May | Moderate or heavy rain shower | 24° /16° | 20 mm | 5 | |
| 18 May | Heavy rain at times | 26° /18° | 2.3 mm | 6 | |
| 19 May | Cloudy | 23° /16° | 0 mm | 5 | |
| 20 May | Partly cloudy | 29° /17° | 0 mm | 7 | |
| 21 May | Moderate or heavy rain shower | 27° /19° | 18.3 mm | 6 | |
| 22 May | Moderate rain at times | 25° /16° | 14 mm | 6 | |
| 23 May | Partly cloudy | 23° /12° | 0 mm | 6 | |
| 24 May | Moderate or heavy rain shower | 18° /15° | 44.8 mm | 4 | |
| 25 May | Light rain shower | 17° /10° | 15.8 mm | 4 | |
| 26 May | Overcast | 18° /6° | 0 mm | 4 | |
| 27 May | Light rain shower | 20° /10° | 2.7 mm | 5 | |
| 28 May | Light rain shower | 22° /11° | 5.7 mm | 5 | |
| 29 May | Light rain shower | 20° /11° | 13.1 mm | 5 | |
| 30 May | Light rain shower | 14° /10° | 25.3 mm | 3 | |
| 31 May | Light rain shower | 14° /10° | 12 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Kōyasan in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Kōyasan forecast closer to your planned date for the most up-to-date weather information.
Change Month
Kōyasan in May - FAQ
What are the expected maximum and minimum temperatures in Kōyasan during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Kōyasan during May?
Significant rainfall exceeding 291.9 mm is expected in Kōyasan during May, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Kōyasan during May?
The average wind speed in Kōyasan during May is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Kōyasan in May?
As you prepare for your trip to Kōyasan in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Kōyasan, during May, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
May rainfall patterns in Kōyasan
Explore the daily rainfall trends and prepare for Kōyasans May weather 💧
UV exposure in Kōyasan during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Kōyasan?Get accurate weather forecasts for Kōyasan, located at latitude 34.217 and longitude 135.583. Stay updated with localized weather information tailored for Kōyasan.
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